Steam-boiler.



PTENTED JAN. 17, 1905.

W. P. L W. G. JLLLLLL STEAM BOILER.

ALPLIUATION FILED SEPT. 11.19u3.

OO OOOOOOO Frm tra. 780,255.

Patented January 1*?, 1905.

` armar Finca.

WILLIAM I). ALLEN AND W ILLIAM G. ALLEN, OF WORCESTER, MASSA- GHUSETTS;SAID WILLIAM I). ALLEN ASSISI-NOR T0 SAID IILLIAM Gr. ALLEN.

STEAllllnllEOlLER..

SPECIFICATION forming part of Letters Patent No. 780,255, dated January1'?, 1905.

Application filed September ll, 1903. Serial No. 172,806.

Be it known that we,WILLIAM I). ALLEN and WILLIAM G. ALLEN, citizens ofthe United States, residing at Worcester, in the county of Worcester andState of Massachusetts, have invented new and useful Improvements inSteam-Boilers, of which the following, together with the accompanyingIdrawings, `is a specification sufficiently full, clear, and exact toenable persons skilled in the art to which this invention appertains tomake and use the same.

This invention relates more especially to steam-boilers of the uprighttubular type having a fire-box and surrounding water-leg at the lowerpart of the boiler.

The object ofA our invention is to provide, in a steamboiler having aninterior column or upright chamber, in combination with the feed-watersupply-pipe and adapted for purifying the feed-water or effecting thesettlement of foreign or mineral substances therefrom. before the waterenters the boiling-chamber, of means vfor conveniently removing thedeposited matter or sediment at the foot of the settling' or purifying'column accessible at the exterior of the boiier, also to provide acylindrical purifier-column having its lower end offset and abuttinglyattached to the boiler-shell, as more fully hereinafter described.

Another object is to provide an upright steam-boiler with an efficientappliance for connecting the feed-water pipe with the side of theboiler-shell and with the side of the internally-disposedpurifier-column standingI with an intervening space between said shelland column.

For the attainment of these objects our intion consists in the parts andcombination of parts particularly specified, and delinitely pointed outin the claims at the end of the specification, a practical embodiment ofour invention being illustrated in the accompanying' two sheets ofdrawings, wherein-M Figure 1 represents a part side part sectionalelevation of a steam-boiler embracing the improved means of ourinvention. Fig'.

2 represents a vertical section of the purifierl column and a portion ofthe boiler-shell on a l somewhat larger scale. Fig. 3 is a sectionaldetail of the feed-water connection. Fig'. 4C is a fragmentary frontview at the foot ofthe purifier-column. Fig'. 5 is a horizontal secntion at line S S on Fig. 2.

Referring to the drawings, B indicates the cylindrical uprightboiler-shell; li, the cylindrical lire-box with crownsheet C,froin whichthe flue-tubes D extend to the head lil of the boiler.

Gr indicates the annular water-leg space be* tween the shell of thefire-box and boilershell, and I the usual radially-disposed stayboltslioining the two shells across said annular space.

E indicates a feed-water pi'nifying appliance consisting of an uprighthollow column or settling-pipe Am-in practice abbut six to eight inches,more orless, in diameter-suitably disposed within the boiler andstanding clear of of the shell B along the greater portion of itsboiling' water between the shell and column. The upper part of saidcolumn terminates with an open top end 3, horizontally coincident withthe low-water line .l or at any desired distance below the regularwater-level L, while the lower end is formed with an ofi'- set outwardcurvature or enlargement 5 in suitable manner to abut against the innersurface of the boiler-shell and is litted for connection therewith by anopen end having at taching-{ianges 7. The interior of thislower endstops against the inner surface of the boiler-shell (see 2, 4L, and 5)and is secured thereto by bolts, rivets, or screw-studs 6 or in otherel'cient manner. A ringl or brace 8 is provided on the interior of theboilershell for retaining the upper part of the column in position, thecolumn being' unattachcd within said ring.

In that portion of the boiler-shell embraced bythe end of thepurilier-column there is provided a hand-hole 9, witha removable closuremeans l0, having suitable fastening devices Il for retaining it inclosed position and for readily releasing it when desired. There is alsoprovided a blowofi` pipe 13, which con length to aflord interveningIspace 2 for the.

nects with the boilershell and enters the puriiier chamber or column Eadjacently above the hand-hole 9.

The feed-water-supply pipe K is arranged to deliver through the side ot'the shell into the column or settling-pipe E at some distance above itslower end and is best connected with the boiler-shell B and also withthe column or pipe E across theintervening space by a tubular bushing15, havinga uniformlythreaded exterior, with portions of varieddiameter, the outer portion 16 being' tapered and threaded into themetal of the boilershell and the inner portion 17 being straight and ofless diameter' and threaded into the metal of the column, (see Fig. 3,)while the feed-water pipe K is threaded into the interior of thebushing-tube 15.

The feed-pipe K and blow-off pipe 13 are provided with suitable cocks orvalves 18 and 19 for controlling the flow therethrough.

The upright interior of the column E being' of much greater area thanthe feed-pipe, it acts as a settling-cha1nber, while its lower end 5 isformed to serve as a sedimentcollecting compartment. The eedwater risesslowly within the column, which is surrounded by the boiling water ofthe steam-making compartment, and the increasing heat of the feed-watercauses the deposit and settlement 0i' impurities within the lower space5 before the feed-water passes over the top of the column into thesteam-making compartment oi' the boiler. Consequently7 the boiler isfreed from much matter that would otherwise settle upon the crown-sheetC. lVith the column or stand-pipe E and connections K and 13 combinedwith the boiler, as shown, the device can serve as a settler, amud-receptacle, and a surface blow-off.

By opening' the blow-ofiQ cock 19 the water within the column E and atthe surface of the boiler down to the line J can be blown oft, takingthe surface scum and floating substances from theinterior. Then desired,alfter blowing oi, as above, the hand-hole 9 can be readily opened andany accumulated material quickly and easily removed from the lower part5 of the puriiier-column. This access being had from the exterior, thecleaning can be donev without completely emptying the boiler. Hence itwill be seen that our improved means lin its combination in the mannersubstantially as described is oi' great practical utility. Y

It is obvious that in some instances, if desired, a part of thefeed-pipe K can be used 'for the blow ott, said pipe being provided withsuitably-arranged branches and stop-cocks, as will be understood bypersons conversant with steam-fitting. A separately-connected feed andblow-oit is, however, preferred, as shown.

The puriiier-column E is preferably formed of such size or dimensionsthat it can be passed through the manhole M and the parts so disposed inrelation to each other that in the event of any repairs or renewalsbeing required the column can after releasing or breaking the fastenings6 be taken from the interior through the manhole M and by reverseoperation again replaced. In some instances a few of the adjacent tubesmight have to be released to permit this removal of the column where thetubes are closely arranged thereto.

le do not claim, broadly, the idea of an upright cylindricalwater-puriiier column within a steam-boiler, as we are aware thatdiilerently-constructed means of that class has been employed prior toour present invention; but our invention relates to the improvedconstruction and manner of combination as defined.

Wrhat we claim as of our invention,and desire to secure by LettersPatent, is

1. in a steam-boiler, the combination of the boiler-shell, a hollowupright open-topped stand-pipe or columnvhaving a for wardly-oifsetenlarged lower end portion, disposed within the boiler, with its lowerend opening against the boiler-shell; means for delivering feedwaterinto said column at a point adjacently above said lower end portion, andmeans, below the feed-water delivery, for entrance into the offset lowerend portion of said column, directly accessible from the exterior of theboiler-shell, for the purpose set forth.

2. A device ofthe character described, comprising in combination with asteam-boiler; a feed-water-settling column within the boiler, and ahand-hole opening directly into the interior of said column from theexterior ot' the boiler-shell. A

3. In a steam-boiler in combination as described, a hollow settling pipeor column dis= posed within the steaming-chamber, and pro vided at itslower end with a flanged mouth fitting against and attached to theboiler-shell, its upper end open to the interior ofthe boiler; thefeed-water pipe connected into the side of said column, a blow-off pipecommunicating' with said column below the feed-water connection, ahand-hole through the boiler-shell into said column below the blow-olf,and a removable closure means for said hand-hole.

4. 1n a' boiler of the character described, the combination with theboiler-shell, of a vertical purifier-column standing clear Within theboiler, and having its lower end turned outward and abuttingly joined tothe inner side of the boiler-shell, a manhole through the boiler-shellopening directly into the interior oil said column, a removableclosure-plate and fastenings for said manhole, a blow-ofi' pipeconnected through the boiler-shell into the purilier-column chamber,means for delivering feed-water into said column, and means forcontrolling the feed andthe blow-orf.

5. 1n apparatus of the character described,

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the combination, of the upright boiler-shell, means for supplyingfeed-water therefor, a settling-pipe or feed Waterpurifier columnstanding' within the boiler, and having the lower offset end connectedto the boiler-shell,

i means for unattachedly supporting the upper part of said column inposition, a manhole in the boiler-shell, through which saidpuritier-column can be bodily inserted and removed, and a removableclosing device for said manhole. y

6. In Combination, with the upright boilershell, the settling-columnWithin the boiler and standing clear of the shell, with its lower offsetportion joined to the inner surface thereof and the laterally-connectedJfeed-Water pipe; of a threaded pipe-connecting bushing-tube thereforscrewed into the metal of the boilershcll, and also screwed into themetal of the settling-column.

WILLIAM P. ALLEN. WILLIAM G. ALLEN. Witnesses:

LoUIs H. ELLIOTT, UHAS. H. BURLnIei-I.

